historical period的用法和樣例：
例句
- The Indo-European language of the Greeks. Greek, the sole member of the Hellenic branch, consists of several groups of ancient and modern regional, social, and literary dialects and is divided into several historical periods.
希臘語(yǔ)印歐語(yǔ)系的希臘語(yǔ)，作為希臘語(yǔ)族的唯一成員，含有幾組地方、社會(huì )和文學(xué)方面的古方言和現今方言，并被分為幾個(gè)歷史時(shí)期
